The game is built using Canvas and you can change which browser you’re playing as by hitting one to five on the opening screen. Having moved away from developing in Flash several years ago Lee-Delisle used “pretty much just raw JavaScript” mixed with a little existing code to handle requestAnimationFrame and the keyboard input" to build Browser Invaders.

Lee-Delisle explains that the JavaScript uses "very simple physics – I’m just oscillating the x position of the invaders on a sine wave. They speed up as the game progresses".